"Finally, there is a type of worm called the priapulid worm or penis worm, named such for its nose-like end which can be stretched or protruded, thus resulting in it looking like a penis."

Source:
http://www.batheinthestupid.com
/askquestion.asp

oh my god look at that butt, her whale tail is showing so high!

freddy, have you remembered to feed your penis worm recently

by gum there seems to be a worm hanging out of my prince albert